英语中to do的用法
今天装修百科网给各位分享to do有哪些作用的知识，其中也会对英语中to do的用法(英语单词todo用法的有哪些)进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在我们开始吧！
英语中'to do'的用法
表be to do”的用法
一般说来，“be to do” 这个结构有两种语法意义，其一是连系动词be+动词不定式做表语，其二是be to是一个**词汇单位，具有情态含义，可以把它叫做情态习语（modal idiom）。
一、be +动词不定式，不定式做表语，表示主语和表语在概念上是等同的。如：
The problem is to find a solution.
His plan is to clean the room.
My wish is to be a doctor.
二、be to +动词不定式中的be to用作情态习语，这时的be to do表示： “计划”、“安排”、“义务”、“应该”、“可能”、“命运”等。（have to，ought to）。如：
He is to have a holiday. （表示将来）
The committee is to meet today. （表示计划、安排）
You are to go to the hotel where rooms have already been booked for you.
1. 表示 “将”、“计划”、“安排”。（意思接近于be going to） 如：
Their daughter is to get married soon.
Who is to question him？
It was the last film at the cinema，which was to close next day.
After dinner they were to go to a movie.
was/ were to do 表示过去曾经计划要做的事，或者过去应当做的事，而且从现在的角度来看已经实现了。如：
I felt nervous because I was soon to leave home for the first time.
I was to play Juliet.
The expedition was to start in a week’s time.
was/ were to have done，表示 “本打算”、“本计划”或“本应当” 做的事而没有做成或没有发生。如：
I was to have seen him last Wednesday，but he didn’t come.
We were to have been married last year.
2. 表示 “义务”、“应该” .（意思接近于should，must，ought to，have to） 如：
No one is to leave the building. 谁也不得离开这楼房。
You are not to smoke in this room.=You are not supposed to smoke in this room.
You are to be back by 10 o’clock. 你必须十点以前回来。
3. 表示可能性，相当于can，may 如：
Such books are to be found in the library. 这样的书在图书馆里就能找到。
Not a single sound was to be heard. 一点儿声音也听不到。
Not a soul was to be seen. 看不到一个人影。
She was nowhere to be found. 哪儿也找不到她。
She was never to see his wife and family again.
5. 表示 “命运”，将来必然要发生的事，译作 “注定……”。如：
He came to power，but he was to play dearly for it： soon he was assassinated.
The worst is still to come.
They said goodbye，little knowing they were never to meet again.
6. 用于“if…were to do”，表示虚拟语气。如：
If it were to rain tomorrow，the sports meeting would be put off. 如果明天下雨，运动会就会延期。
Exercises：
1.This film _____ this Sunday.
A. is going to show B. is showing C. is to be show D. will have been show
2.The students were told that they ____ at the school gate at 2：00 the following afternoon.
A. met B. will meet C. were to meet D. were met
3. The house ______ ready today but as there has been a builders’ strike it is still only half finished.
A. is B. was to be C. was D. was to have been
4.In such dry weather，the flowers will have to be watered if they _________.
A. have survived B. are to survive C. would survive D. will survive
5.How _______ I ______ what has become of him？
A. am； to know B. am； knowing C. was； to know D. will； know
6. ______ he ________ tomorrow，I would go to meet him at the station.
A. Were； to come B. Was； coming C. Did； come D. Would； come
目的时用啊
be to do 的用法详解
to do作非谓语有哪两种功能？
您好，动词不定式to可以用作主语或状语。
希望对您有帮助。
有几个问题求各位英语大佬给个解释 It's difficult for sb to do sth
你的理解基本正确，但不必纠结这些问题。
1for sb to do是不定式的复合结构，如果非把for sb 放在后面，则可以看作是介词短语作状语。
2不及物动词加介词，可以看作是动介短语，也可以把介词短语看作状语修饰不及物动词。
如he是主语goes to是谓语 school是宾语
he 是主语goes是谓语to school 是状语
3，4不必纠结这些问题，根据语境明白意思即可。再如 i saw a book on the desk.中的on on the desk看作是状语定语宾补皆可
be dying to do怎么用的为什么会有这个解释
be dying to do
英[bi: ˈdaɪɪŋ tu: du:] 美[bi ˈdaɪɪŋ tu du]
渴望做某事
因为dying有“渴望的”的意思。
dying
英[ˈdaɪɪŋ] 美[ˈdaɪɪŋ]
adj. 渴望，切盼; 垂死的，临终的; 会死的; 快熄灭的;
to do 和 doing 有什么区别
to do和doing的区别为：意思不同、用法不同、侧重点不同。
一、意思不同
1、to do：待办事项。
2、doing：所做的事，发生的事。
二、用法不同
1、to do：动词不定式，为非谓语动词。在英语语法中，动词不定式是指动词中的一种不带词形变化从而不指示人称、数量、时态的一种形式。它之所以被称做不定式，是因为动词不被限定，或者说不被词形变化所局限。不定式属于非谓语动词形式。
2、doing：动名词，指的是动词ing形式的一种，兼有动词和名词特征的非限定动词。它可以支配宾语，也能被副词修饰。动名词有时态和语态的变化。英语中的动名词是由动词变化而来。
三、侧重点不同
1、to do：侧重于表示想做但是还没做的事。
2、doing：侧重于表示正在做的事。
doing和todo在开头有什么区别
Doing和to do的区别具体如下：
to do 表目的 去做某事
doing 用于介词后面 表状态
to do 和doing，它们都只是固定搭配的词组，使用的时候一定要注意仔细区分。
正确使用单词和记忆单词，才可以让语言的表达更加的规范化。
记单词的方法如下：
1 阅读记忆法 也就是把词汇的记忆融入阅读之中，在看一篇文章的时候，遇到不认识的单词先做记号，并猜测它们的含义，等到把全文看完后再从字典上把它们的意思找出来。
这种方法不枯燥，记得比较牢，但缺点是记忆的词汇量比较少，而且耗时也比较长，不适合想求速成的同学。
2 笔记记忆法 灵感来源于一篇文章，说某君从不背书，只抄书，每一本书都被他 抄了几遍，这样最后全数的内容都印在了他的脑海中。
这大概是书上的铅字经自己用笔抄下来后，好象就成了自己的东西，对自己就没有排斥反应了。
具体做法是找一本笔记本，把它的一页按中间对折，然后从字典上把英汉意思抄上去，英语单词或词组抄在左边，汉语意思抄在右边。
然后对所有的词汇背三遍，先英汉对照背一遍，然后分别只看英文或只看汉语解释背一遍（把页面折起来，使自己看不到英文或中文部分，以免受干扰）。
这种方法记忆的量大而且比较牢靠，只是需要不怕累的人才能做到。
to do开头的句子与doing开头的句子的区别，给充当什么成分？请问？
既然是开头，那就很有可能是主语。
to do 和doing 某些时候可以相等，某些时候不同，具体请给例子。